Portable engraving-machine



F. R. SUMMER AND E, K. SKONBERG.

PORTABLE ENGRAVING MACHINE.

APPLICATION FILED Aue.22,1919.

1,356,796. Patented 0ct. 26,1920.

3 SHEETS-SHEET I.

Elana are; E R015 ommer,

101mm I Shiv/b813,

F. R. SUMMER AND E. K. SKONBERG.

PORTABLE ENGRA'VING MACHINE.

APPLICATION nuzn Aue.22. I919.

1,356,796. Patented 001;; 26,1920.

3 SHEETS-SHEET Z- & k\\\\\ @uuwatm FR. Summer,

with:

a tlmwu,

F. R. SOMMER AND E. K. SKONBERG.

PORTABLE ENGRAVING MACHINE.

APPLICATION FILED Aue.22. 1919.

1,356,796. 7Batented Oct. 26, 1920.

3 SHEETSSHEET 3.

35 58 "in- W14- 2 f 5.5 m 21 "\ZZ16 fa Z0 19 T attain,

UNITED STATES.

PA-r.

NT orrics.

FRED R. SUMMER AND ERIK K. sKoNBnRG, or ROOKLYN; NEW YORK.

T 0 all 20 7mm it may concern:

Be itknown that we, FRED R. So MnR and ERIK K. SKoNBEno, citizens of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements' in Portable [Engraving-Machines,

of which the following is a specification.

This invention relates to improvements in engraving machines, and has special reference to a portable type which may be read ily transported or carried from place to' place to suit the engravers convenience.

A primary object of the invention is to provide an engraving machine having a novel. cutter carrying carriage whichautomatically raises and lowers the cutter by the same movement that is'necessary to change the direction of travel thereof. In this connection the invention also contemplates a novel arrangement whereby the cutter may be employed to do curve linework as well as straight line ruling without interfering with the raisingand lowering of the cutter as above set forth. I

A further object of the invention is'to provide a novel arrangement whereby theiwork carrying table or platen may be readily. detached from the machine to facilitate the removal of the ruledor marked plate, and

' also permit of the substitution of one, platen for another to expedite the engravers work. That is to sa T since the lateto be en- P graved is held onthe platen by wax it is the custom to heat the platen to remove the plate, and to save timeit isdeslrable to use a fresh platen whilethe heated one'iscool mg. l 7 7 a .Astill further ob ectf of theinvention is to provide simple and accurate ad3usting means for the platen which will notbe. ef-

the present improvements is showninthe.

accompanying drawin s in which v. I .Flgure 1 1s aplan v1ew of our improved machine.

the invention is better un- PORTABLE: ENGRAVING-MACHINE,

Specification of Letters Patent. t t 0 1;; 2 20 Applicationzfiled August 22, 1919. Serial No. 319,221. i

out of-contact withthe work;

Fig. 4' is a vertical sectional view takenv on the line 44 of Fig. 1. 1 r

Fig. 5 is a vertical sectionalview on the line 5-5 of'Fig. 1. f;

Fig. 6 is a cross sectional View taken'on the line 66 of Fig.- 1,

taken 7 Fig, 7 is a detail; sectional view showing v y 7 the connection between the shiftable' workcarrying platen and the feed screw.

illustrating the y Similar reference characters designate corresponding parts throughout the several figures of the drawings. y

In carrying the present-invention into effect it is proposed to provide a supporting bed or frame -1 of substantially rectangular formation and having securedto' the opposite sides thereof adjacent one end the up standing cutter-carriage trackway su'ppo'r 9 ing arms or brackets 2, whereby the said cutter carrying carrlage designated gener I ally as C may be'mounted tohave a movement transversely of the frame 1 and above the work-carrying platen unit D. T he said work-carrying platen D is slidably mounted on the frame 1 to move longitudinally there,- o'fand at right angles to the carriage C; and for the purpose of providing for the -accu.-,

rate shifting of the platen the said frame 1 is formed with the opposite rails 3 and 4, the former being preferably of a substantially peaked formation in cross section whilethe latter is-fiat whereby the relative wea-rbetween the pjlaten unit and the frame maybe compensated "for and distributed inthe most effective manner..

The platenunit Dipreferablyincludes in V l i its organization a base member 5 formed wlth'the ra l engaging shoe portions 6 and 7 forslidably'eng'agalngthe rails 3, and ,4, r v

while the central portion thereof formed with; an upstanding collar 8 and a tapered opening. 9. r for receiving a correspondingly tapered hub or spindle portionlO of a rotary platen member 11. The said rotary platen f'member 11 is preferably provided with a depending 'skirt. or flange, portion 1'2 who'selower edge is adapted toihavefa I 110 free traveliru en a ementwithanai stand I z: c z:

i ing rim or head portion 13 of the base 5,

' while its external circumferential surface is provided with aplurality of vertical feed-n mg'not'ches ltadapted to cooperate with a suitable feeding device to bepresently referred to, to rotate the platen on the base forthe desireddistance to meet the requirements of the work under execution. For

.the purpose of preventing undue rotary movement of the platen 11, the central hub portion1O is provided with a suitable aXially located screw threaded socket for receiving a fastening 16 thatoholds a friction washer '17. in contact with the underside of the base 15. It'will therefore be apparent that by reason ofthe tapered fit'of the hub into the base and the friction washer 17, the entire platen 11 is frictionally held on the baseand may only rotate when propelled by the operator.

To provide for theshifting of the platen unit D on the frame 1 a feed screw 18 is employed, and as shown in Fig. '4 of; the

drawings the opposite ends 19 and 20 are journaled-in the end walls of the frame 1.

The said feed screw 18 carries therewith a 7 -;feed. nut 21 and the same is'provided with one or more sockets 22 in one face thereof for removably receiving the positioning pins "23 earned by the underside of the frame 5 of the platen 'unit. lViththis arrangement it will be apparent that-since the entire platelr'unit'has a free riding engagement on th elrails 3 and 4: of the frame and also has a detachable connection with the feed 1 nut 21 it "is possible to remove the entire platen unit independently,of any other i mechanism and substitute another one if desired; 1

. 'Again referring to the platen unit D it.

will-be'observed that the same may be-rotat'ed on thebase 5 through the provision of portions of the base 5 constitutes a pivot 7 "axis for one end'of a feed lever 24 which :lies flat on the'upper surface ofthe basefi ainovel lever and stop arrangement which is clearly shown in Figs. 1 and 4 of the drawinIgsJ That is to say; the upstanding collar and projects through a cut-away portion of the riin' 13-whereby its gageside' 25 may {*PELSS over a suitable scale 26 formed on an.

'arcuate scale eXtension of the ba'se 5. The

gage end of the lever 24 car-ries'therewith a spring pressed detent or feed pawl 27 whose latch end'28 is adapted'toengage with the notches 1 4 in the skirt or flange fportion 0f the platenllfand for'the purpose of rotating the saidplaten only the desired portion of a c rcle; the gage edge 29 of the device 2' 7 coiiperates with a pin or key 30 which-may be 'in'serted in anyone of a pluralityfof v openings 31 opposite the indicia o'n thesc'ale V 26. Qbviously,' since the pin 30 may be 1;" firmly pushed into one of the openings 31,

it cannot be-moved or shifted out of place by the relative tapping or hammering action of the gage side 29 of the lever 24 when the same is constantly shifted by the operator to intermittently rotate the platen.

From the foregoing it will be apparent that circular line work may be accomplished by shifting the platen 11 through the aid of.

the spring pressed pawl or feeding device may be brought into use when straight line work is desired. This lock may be of any desired and suitable type but is preferably an eccentric 32 shown in Fig-s. 1 and 6 and having an operating handle 33 whereby it may be rotated on its supporting spindle'34 'to have a binding engagement with the pe-.

ripheraledge portion of the platen-flange 12. This positive lock for the'platen is regarded as of material importance to insure absolute accuracy in the execution of straight line work, since it guards' against.

any accidental movement or creeping'ofth'e ca rriage through' carelessness of the operator or otherwise. 1

In connectlon with the feed screw 18 which shiftstlie platen unit longitudinally of the frame it is to be observed that the end 19 thereof has suitablyfitted thereto a driving gear wheel 35 which-is adapted to be engagedby the ratchet pawl-36 ofanian ually operated feeding lever loosely V mounted on the end 19 of thescrew shaft 18 betweenthe'wheel' and a' sca'le part or member 38 carried by the frame. As shown vided with openings 42 for receiving a stop in Fig; l the arm of lever 37 carries a stud 39 projecting through an arcuate slot in the wall of scale member 38' to thereby ,move

beneath the flange 41 thereof-which is pro;

pin 43 whoselower endprojects down into .the path of movement 0f thev stud 39 and constitutes an abutment or stop for limiting the movement of the oscillatory feed lever 31' VViththe arrangement described it will be apparent that uponfthe manipulation or rocking of the lever37. byfthe operator, the

feed screw 18 will be intermittently rotated toadvance-the platenlunit D regular dis tances at the proper spaced'intervals. Ob-

viously, by setting the stop. pin: 43 at the desiredplace on the scale,' any desired num-fl ber of stops mayjbe made-within an inch,"

according to the number of lines per inch f to be ruled. By reason of .the relative 'longitudinal and-rotary movement of the platen. D within the frame itlwill be apparent that any desired combination and arrangement of curved or straight linesjcanb'e madelby; the cutter mountedon the carriage-1 acor equivalent fastenings f, and asswill be;

cording to the range of adjustment provided by the scales 26 and 38. 7

Referring now to thenovel carriage unit C it will be observed from the several figures of the drawings, that the entire unit has a relatively free slidable mounting on the tracks 44 and 45 which are secured to the supporting arms or brackets 2 by screws seen from Figs. 4 and 5 the track 44 has a curved or equivalent tread portion while the track 45 is flattened as at 46 to obtain the same advantageous results in the distribution and take-up of wear, as. exists in connection with the mounting of the platen unit D on the frame.

The cutter unit C essentially includes in its organization a platform 47 having the track-engaging portions 48 and 49, and for the purpose of preventing accidental dis'' placement of the carriage from the track, and also holding it stationary when the cutter is set for circular work, a novel guard unit is provided. This guard unit prefer-v ably consists of a clamping member 5O which is secured to a clamping post 51 by means of a screw or equivalent fastening 52 while the said post 51 has a square portion fitting. within a square opening .53 in the platform of the carriage and provided'with an adjustable clamping nut 54 at'its upper end. Because of the fact that the clamping member 50, which is preferably resilient,is rotatably mounted on the end of the post 51, it will be apparent that the same may be turned longitudinally of the carriage when the-same is placed on the tracks so as to clear the same, and then when the carriage is in position it may be turned transversely thereof as shown in Fig. 4 and the clamping nut 54 tightened-up to hold the carriage stationary if desired. Of course if it is not desired to hold the carriage in a fixed position the tension nut 54 may be loosel placed in position so that theopposite en s of the clamping member will not'have a firm binding engagement with the under sides of the tracks 44 and 45, but will simply exert a frictional holding pressure which will permit the shifting of the carriage, and yet at the same time prevent its accidental displacement. V i

To facilitate the free shifting of the carriage on the tracks 44 and 45 suitable lubricating wicks 55 may be employed as shown'inFig. 4. 'The arrangement of the wick 55 or equivalent"lubricant holders is such that oil inserted in the openings abovethe same in the platform will be retained and fed onto the tracks as required.

A novel and distinctive feature of the carriage unit exists inconnection with the cutter carrying frame which is pivotally mounted in the upstanding pivotears-56of the platform. ,This cutter carrying frame includes main pivot shaft 57 pivotally carried by either one of said arms will cause more vor less downward pressure to be exerted on the rigid support1ngarm'60 ac:

cording to the position of the weight 63. I

That is to say, if the weight 63 is carried on: the arm 62 as shown in Fig. 1, the rigid sup-' porting arm 60 will-haveaten'dency to'exert a maximum downward pressure in a clockwise direction, but on the .other'h and if the weight 63 is carried by the arm 59, as shown by the dotted lines in Fig. 2 theweight of the weight of the .rigid supporting arm 60 and the parts carried thereby will be counter-balanced more or less according to the positionof the weight. on said arm 59;

The purpose of this arrangement is to im pose more or less weight on the cutter car ried'by the frame to make light or heavy lines as desired. Y

The supporting bracket portion 61 0f the" rigid arm60 is provided with the'vertically disposed pivot'elements64' for mounting a swinging cutter carrying arm 65. f ThiS swinging cutter carryingiarm by reasonof its particularmounting in the bracket .61 may therefore have a horizontal movement as well as a vertical movement for the purpose of making wave lines oradjusting the cutter at a greater or less lateral distance from the carriage. To facilitate the clamping and holding of the cutter carrier 65 in a stationary position when straight line ruling is tobe carriedoutfa clamping member '66 carried bythe support;

to receive clampingscrew 67011 the swinging cutter carrier 65 maybe employed.- Also for the -purpose of tensioning the laterally swinging cutter carrier 65a spring 68 may be fastened to the inside face of the carrier and the rigid-[supporting arm 60. when th'e"clamping-screw 67 is loosened the swinging'cutter carrier 65 is free'tomove under the tension ofjthe spring 68, but -.on

.ing-arm 60 and having'a slotted end portion Thus 1 v I the other hand when the; set screw 67 is i tightened the swinging cutter carrier will be maintained in a fixed position v The relatively freeend 'portion' of the swinging cutter carrier has'a cutter holder 69 pivoted thereto as at 70 and the said holder is provided with a clamping screw-71 for holding a diamond point cutter ,72' in posi tion. By reason of the adjustment made possible throughthe manipulation of the clamping pivot/70 the cutter holder. 69 may beadjusted so that the cutter 72 may be' s'et ina perpendicular position .as1'shown by the dotted lines in Fig. 2, or else assumethe inclined position shown in full lines in that lniorderto enable the operator to shiftthe entire carriage unit C onthe trackway between thestop clamps S, the same is provided i'with a manipulating handle 73,

which is clearly shown in Figs. 2, 3 and 5 of i the drawings and pivoted in an opening 1n the platform 47 by a pin 74 or its equivato the upper surface of the platform 47 and 'w'hen in' this position the pin75 holds the I 5.

lent whereby it may have a free oscillating movement; Projecting from one edge of the handle 73 is a lifting pin '75 adapted to: have a supporting and bearing engagement with the underside of the rigid supporting arm '60.] In the normal position of the handlewhich is shown in Fig. 2 of the draw ings, the. same. occupies an oblique relation entire cutterfcarrying frame in a substantial'ly horizontal position, and the cutter 72 is'adjusted with'reference to the work on the platen so that its cutting point is in touchingcontact therewith. 7 I WVhenthe handle is raised to a substantially vertical: position by the act of reversing the direction ofthe travel, of the carriage, the pin 7 5 acts as cam to lift the entire cuttercarrying'frame so as 'to elevate the cjuttin g point of the cutter172 (see Fig. 1 3). VVith'the arrangement described it will be apparent that when the operator pushes thecarriage in the direction of the arrow in Fig. 2 by holding onto the handle 73 the cutting point of the cutter will operate on' the work. However," as soon as he has reached the end of the working stroke and desires to-return the carriage fora fresh stroke, the act of reversing the'm'ovement of the-carriage through the handle 73: causes the'latter to; assume 11161308111011 shown n during the return stroke. -This is a feature of practical importancesince it increases the speed of operation of the mach nesince the of the platen and the stroke-of the "carriage 7 7 to make the desired cutson the work. A further "feature of :the invention is the provisionof means for holding a fixed ruler in position onthe bracket arms 2 whi'chsup a'fancy edge 7'? maybe clamped between the slotted supporting ends 78"of 'the frameby means of suitable clamping screws 79- or Y their equivalent. Obviously,-a ruler or strip ofany design may be substituted for the one shown in the drawings, and because of the "fact that the swing ng cutter carrier is stroke of the carriage. 1

under the tension of the spring 68 when released by the screw (57, itwill be understood that the cutter willaccurately and closely follow 'the'edge 77 to make the desired design.

Without further description it is thought that the featuresand advantages of the invention will be readily apparent and:it will of course be understood-that changes in the form, proportion and minor details of con struction maybe resorted to without departingfrom the spirit of the inventionor scope of the appended claims.

To claim i 1. A portable engraving machine includrectilinearlv movable cutter carriage unit mounted abovethe platen, a cutter carried by'the carriage, and cutter shifting means inoperative during the forward stroke of the carriage to raise the cutter from contact with the platen and. automatically operative to raise the cutter. from the platen. during the-reverse strokeof the carriage." 2. A portable engraving lllZtClllIlG'lIlClUCling a shiftable and rotatable platen unit, a

. ing a shiftable and rotatable platen unit, a

rectilinearly shiftable cutter carriage unit mounted'above' the platenpa cutter. having a vertical and lateral adjustment in said carriage, and. shifter means for: the carriage adapted toautomatically raise and lower the. cutter. 1 f 1 3. A portable engraving machine 'illClLlCl. ing a shiftabl'eand rotatable platen unit, a rectilinearly movable cutter carriage :unit' mounted above the same,.a cutter carrying frame ournaled in the-carriage, aicutter car .ried'by the frame, a propelling-handle for thecarriage, and means carried by" the" handle and engaging withsaid frame to elevate the latter upon the reverse stroke of the carriage. V 1

14. A portable engraving.machine including a shiftable and rotatable platen unit, a rectilinearly movable cutter. carriage unit; mountedabove the platen unit, a cuttercarrying frame pivoted transverselyof the carriage tohave a verticalmovement therein and having a portion thereof pivoted to "swing in a horizontal plane, a cutter adjust ably carried by the horizontally swinging. portion of said frame, a handle pivoted in the carriage parallel to the frame pivot and having a lateral projection adapted to 'engage 'Stld frame whenth'e handle is moved.

to a vertical position to'eifect the reverse 5. 'Aportable engraving machine including a shiftable and rotatable platen unit, a

rectilinearly .mov'able cutter carriage unit mounted above'the-platen and including'a platform having upstanding pivot ears at oneend,.acutter carrying frame. including a mainshaft pivoted between said ears and having radial extensionsqdisposedi in oppo-- site directions, a cuttercarrier swingingly mounted 1n one of said extensions to move in a horizontal plane, a cutter fitted in said carrier, clamping means for holding the cut ter in a stationary position with reference to the carriage, and a handle element plvoted in the platform and having a, portionried by said main shaft, a bracket carried by one of said extensions, a swinging cutter carriage mounted in said bracket and adapted to move in a horizontal plane, a cutter holder pivotally carried by the outer end of said cutter carrier, means for adjusting the swinging cutter carrier in a fixed position, a tension spring between the swinging cutter arm and one of the radial extensions and adapted to function when the stationary clamp means is released, and handle means for shifting the carriage. i

7. A portable engraving machine including a shiftable and rotatable platen unit, a rectilinearly movable cutter carriage unit mounted above the platen and including a platform, a cutter carrying frame pivoted transversely of the platform and having radial extensions disposed in opposite directions, a cutter carried by the frame, and a weight adapted to be adjustably fitted to either one of said radial extensions to cause the cutter to exert a greater or less downward force.

8. A portable engraving machine irfcluding a bed frame, a rotatable platen unit shiftably mounted on said bed frame, track supporting brackets carried by the bed frame, tracks in said brackets, and a cutter carrying unit mounted on said tracks and including a platform, and an adjustable displacement preventing guard and setting device carried by the platform and adapted to engage with the under side of the track.

9. A portable engraving machine includin a bed frame, a rotatable platen unit shiftably mounted onrsaid bed frame, track supporting brackets carried by, the bed frame, track means in said brackets, and a cutter carrying vunit mounted on said tracks and including a platform, and a combined displacement preventing guard and setting device carried by the platform and 111011101 ing a clamping member adapted to be disposed transversely of the tracks beneath the same, a clamping post carried by said clamping member projecting through the platform, and an adjustable clamping nut matching saddle portions for the tracks.

carried by the upper endof the postand adapted to engage the upper surface of the platform to maintain the clamping member in frictional contact with the under side of the tracks. l

10. A portable engraving machine including a shiftable and rotatable platen unit,- a carriage trackway supported above the platen unit, a ,cutter carriage slidably mounted on said trackway,.-and a combined displacement preventing guard and settin device carried by the carriageand adapted to engage the tracks. p 1 llfiAn engraving machine including a shiftable cutter carriage, tracks for the oarriage, said tracks having respectively flat and peaked treadsurfaces, and the cutter carriage including a platform having 12. An'engraving machine including a table platen unit shiftably mounted on said rails and including a base carrying a lug,

a feed screw journaled in the frame, a feed nut carried by the screw and provided with a socket for receiving the lug carried by the base of the platen unit. 13. An engraving machine including a bed frame having platen supporting rails,

a rotatable platen unit shiftably mounted on said rails, said platen unit including a base, a feed screw journaled in the bed frame, a feed nut carried thereby, and means carried by the base of the platen unit for detachably engaging the feed nut,

14:. An engraving machine including a bed frame having platen supporting rails, a rotatable platen unit shiftable on said rails and including a base provided with a centrally tapered opening, a platen having a work supporting surface and a depending flange portion resting on said base, a tapered hub portion carried by the central part of 1 the platen and adapted to 'fit into said tapered opening of the base, and a friction washer carried by the hub portion and adapted'to engage with the base to place the platen under tension.

15. An engraving machine including a bed frame having platen supporting rails,

a rotatable platen unit shiftably mounted on said rails, and including a basehaving a central opening and an upstanding hub portion fitted in said central opening, a depending ratchet flange carried by said platen, a

on said base concentric with the collar and 130,

85 bed frame having supporting rails, a rotahaving a ratchet flange, a feed lever pivoted about the collar and extending to an exposed position from beneath the platen, a spring pressed detent' carried by the free end of the lever and adapted to engage the ratchet flange of the platen, a gage extension formed at one end of the base provided with a plurality of gage holes, and a pin adapted to be fitted into any one of said holes to limit the extent of movement of the feed lever.

17. A11 engraving machine including a bed frame, a rotatable platen unit sh-iftably mounted on said frame, and including a base, a platen pivotally mounted on said base and frictionally heldthereto, a feed lever adapted to engage with the periphery of the platen, and a locking device carried by the base and adapted to engage with the platen to hold the same stationary.

18. An engraving machine including a bed frame, a rotatable platen unit shiftably into contact therewith to hold the said platen stationary.

In testimony whereof we hereunto aflix our signatures in the presence of two witnesses.

FREDR, SOMMER. ERIK K. SKONBERG.

Witnesses: V. V V

CARL A. 'KARLsoN, CARL G. SKONBERG'. 

